I have an Akra slip on and am considering adding an x pipe. I'm in CA so I'm concerned about smog testing. I've read on other forums that it is difficult to pass the sniffer with 100 cell cats but pretty easy with 200 cell cats. I've asked several sponsors about getting 200 cell cats on the Akra mid pipes and they all say it isn't possible. Do you think I need 200 cell cats and how do I get in touch with IND? Also, are the primary cats and thus the O2 sensor affected?
2008 Alpine White E92 M3: Remote Stage I and DCT tune by BPM Sport (Mike Benvo), remote convenience coding + coding for mDrive w/Euro MDM (no iDrive!!!) & alarm retrofit also by by BPM Sport, Fox Red interior, Akrapovic Slip-On exhaust, resonator delete, carbon fiber BMW badges, black grills, black OEM M3 ZCP 19" wheels